Stem battle chassis 4wd

Create a practical, buildable 3D CAD model of a small remote-controlled STEM competition robot for a student team of 3 beginners. Competition requirements: - Maximum external dimensions: 300 × 300 × 300 mm. - Maximum total mass: approximately 3 kg. - Remote-controlled movement. - Must comply with the competition regulations for a robot battle. - The design must be safe, stable, reliable, and realistic to assemble within 14 days. Design requirements: 1. Create a compact rectangular chassis with four wheels. 2. Include clearly separated spaces for the battery, motor controllers, receiver, control board, and wiring. 3. Add mounting holes and brackets that can realistically be manufactured. 4. Use simple geometric shapes and a beginner-friendly design that can be recreated in Tinkercad. 5. Use millimetres for all dimensions. 6. Avoid unnecessary decorative parts, complicated curves, and expensive custom components. 7. Make the battery and electronics securely enclosed and protected. 8. Keep the centre of gravity low and ensure easy access for maintenance. 9. Include a top view, front view, side view, and isometric 3D view. 10. Provide a dimensioned engineering drawing and a parts list with quantities. 11. Identify which parts can be made from flat plastic, wood, or 3D-printed components, subject to competition rules. 12. Export the geometry as STL files, preferably with separate files for each part, if supported. Important constraints: - Do not invent specifications for motors, batteries, or electronics. Mark unknown component dimensions as placeholders until actual components are selected. - Do not claim the design is competition-ready until its dimensions, total mass, electronics, and safety have been verified. - Do not include dangerous weapon-construction instructions. Leave any competition-specific active mechanism as a separate, nonfunctional mounting area until the design is reviewed and approved by the teacher and competition organizers. Output: First show the complete 3D chassis concept. Then provide exact dimensions, a parts list, assembly guidance, and instructions for recreating the model in Tinkercad step by step. Prioritize a simple design that students can actually build, rather than a futuristic concept that only looks good in a render.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.